Re: [libvirt] [PATCH 12/41] tests: Add CPU detection tests

So far we only test CPUID -> CPU def conversion on artificial CPUID data computed from another CPU def. This patch adds the infrastructure to test this conversion on real data gathered from a host CPU and two helper scripts for adding new test data: - cpu-gather.sh runs cpuid tool and qemu-system-x86_64 to get CPUID data from the host CPU; this is what users can be asked to run if they run into an issue with host CPU detection in libvirt - cpu-parse.sh takes the data generated by cpu-gather.sh and creates data files for CPU detection tests The CPUID data queried from QEMU will eventually switch to the format used by query-host-cpu QMP command once QEMU implements it. Until then we just spawn QEMU with -cpu host and query the guest CPU in QOM. They should both provide the same CPUID results, but query-host-cpu does not require any guest CPU to be created by QEMU. Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com&gt; --- tests/Makefile.am | 4 ++ tests/cputest.c | 156 +++++++++++++++++++++++++++++++++++++++- tests/cputestdata/cpu-gather.sh | 35 +++++++++ tests/cputestdata/cpu-parse.sh | 57 +++++++++++++++ 4 files changed, 249 insertions(+), 3 deletions(-) create mode 100755 tests/cputestdata/cpu-gather.sh create mode 100755 tests/cputestdata/cpu-parse.sh

diff --git a/tests/cputest.c b/tests/cputest.c index 431b587..2b243bb 100644 --- a/tests/cputest.c +++ b/tests/cputest.c

@@ -458,12 +474,114 @@ cpuTestHasFeature(const void *arg) } +static int +cpuTestCPUID(const void *arg) +{ + const struct data *data = arg; + int ret = -1; + virCPUDataPtr hostData = NULL; + char *hostFile = NULL;

+ char *host;

+ virCPUDefPtr cpu = NULL; + char *result = NULL; + + if (virAsprintf(&hostFile, "%s/cputestdata/%s-cpuid-%s.xml", + abs_srcdir, data->arch, data->host) < 0 || + virtTestLoadFile(hostFile, &host) < 0 || + !(hostData = cpuDataParse(host))) + goto cleanup;

+ + if (VIR_ALLOC(cpu) < 0) + goto cleanup; + + cpu->arch = hostData->arch; + if (data->api == API_GUEST_CPUID) { + cpu->type = VIR_CPU_TYPE_GUEST; + cpu->match = VIR_CPU_MATCH_EXACT; + cpu->fallback = VIR_CPU_FALLBACK_FORBID; + } else { + cpu->type = VIR_CPU_TYPE_HOST; + } + + if (cpuDecode(cpu, hostData, NULL, 0, NULL) < 0) + goto cleanup; + + if (virAsprintf(&result, "cpuid-%s-%s", + data->host, + data->api == API_HOST_CPUID ? "host" : "guest") < 0) + goto cleanup; + + ret = cpuTestCompareXML(data->arch, cpu, result, false); + + cleanup: + cpuDataFree(hostData); + virCPUDefFree(cpu); + VIR_FREE(result); + return ret; +}